Assiqnor to the wilming



(No Model.)

L. M. MATHEWS.

BLOW PIPE.

No. 442,194. Patented Dec. 9, 1890.

QHOMIMZW NlTE STATES PATENT OFFICE.

LEROY M. MATHEWS, OF LlUvRENCE, KANSAS, ASSIGNOR TO THE \YILMING- TONDENTAL MANUFACTURING COMPANY, OF PHILADELPHIA, PENN S Y'LVANIA.

BLOW-PIPE.

SPECIFICATION forming part of Letters Patent No. 442,194, dated December9, 1890.

Application filed June 20, 1890. Serial No. 356,056. (No model.)

To (ZZZ whom it may concern:

lie it known that I, LEROY M. MATHEWS, of Lawrence, Douglas county,Kansas, have invented certain new and useful Improve- 5 ments inBlow-Pipes, of which the following is a full, clear, and exactdescription. reference being had to the accompanying drawings, forming apart hereof.

My invention relates to certain new and x useful improvements inblow-pipes; and it consists in the novel combination and arrangement ofdevices, as will be hereinafter specified and claimed.

My object is to provide a blow-pipe which I can be employed eitherinconnection with an alcohol-lamp or by securing thereto a gassupply tube,and it is so constructed that when used with gas the power and size ofthe jet may be controlled, as will be readily understood from thefollowing specification, taken in connection with the drawings, inwhich- Figure 1 is a perspective view of the blow pipe with the gas andmouth tubes attached.

Fig. 2 is a top plan view of the same with the gas-tube removed. Fig. 8is a vertical central sectional view. Fig. 4: is a section on line 00 a:of Fig. 2.

A represents a blow-pipe consisting of the 0 casing B, provided with thedownwardly-extending screw-threaded portion 1), upon which is securedthehandle O. The casing B is provided with the vertical and horizontalpassages D and G. Secured on the vertical passage is the pipe D, havingan annular lip (Z, over which the lower end of the gas-connect ing tubeE is secured. The projections F and f, integral with the casing B,extend rearwardly and forwardly, respectively, from the 40 upper surfaceof the same, the object of which will be hereinafter specified.

The cylindrical casings II and I are journaled to allow a revolublemovement in the horizontal passageway of the casing B. The

casing ll is provided 011 its outer end with the annular flange orshoulder 72., from which projects laterally the thumb-piece h. Coiledround the casing H is the spring K, having one end secured in an openingin the flange or shoulder 71. and the opposite end coiled round andengaging the forward projection f of the casing B. The casing I isprovided with the upwardly-extending ear 1', through which operates thethumb-screw J, the inner end of the same bearing against the stop orprojection F of the casing B. A pipe or tube L is secured rigidly to theinner surfaces of the casings H and 1, extending, as illustrated,through them and provided on its outer end with the exteriorscrew-threads Z, upon which is adjustably secured the sleeve or casingM. Secured preferably to the inner surface of the pipe or tube L (butwhich may be a decreased extension of the said pipe) is the collar N,provided on its rear end with the annular flange or lip 71, over whichis secured one end of the air-connecting tube 0, to the opposite end ofwhich is secured the mouth-piece P, or which may engage with a bellowsin any suitable manner, as desired. The pipe L is provided with the slotZ, which in its normal position is slightly in alignment with thepassage-way D, as shown in Fig. 3. The air-conducting pipe Q,considerably smaller in diameter than the passage-way of the pipe L, is7 5 secured therein at its front end by soldering or any other suitablemanner, and in the collar N at its rear end. A nozzle q is screwed uponthe forward end of the air-conducting pipe Q.

In operation the blow-pipe is arranged as shown in Figs. 1 and 2 whenused in connection with gas. The adjustable sleeve M is moved forward onthe pipe L until it is flush with or beyond the end of the nozzle q, orthe sleeve may remain stationary and the nozzle beremoved, as desired.The gas being turned on passes through the tube E, pipe D, and openingZ, surrounding the tube Q, and escaping at the forward open end, towhich a lighted match is applied. The flame is small and weak owing tothe small quantity of gas passing through the opening Z, but may beincreased at will by operating the thumbscrew J, which impinges againstthe stop F, causing the sleeve or casing I to revolve, and this havingthe pipe L secured rigidly to its inner surface causes the slot torevolve until the amount of gas needed to increase the flame to thedesired intensity is obtained. The flame may also be increased at willby depressing the thumb-piece h of the casing H, which operates the slotin the manner described, but Which on removing the pressure returns toits normal position by the contraction of the spring K,which is securedat either end, as described.

The object in having the sleeve advanced or the nozzle removed is toallow the full force of the air from the mouth or bellows to play uponthe flame. \Vhen used in co11- nection with alcohol-lamps, the tube E isremoved and the sleeve M moved rearwardly upon the pipe L or removedentirely, if desired, so as to allow the free and uninterrupted egressof air.

Having thus described my invention, what I claim as new, and desire toobtain by Letters Patent, is-

1. In abloW-pipe, the combination, with the casing B, having passages Dand G, of the casings H and I, located in either end of said casing B,the pipe L, having a slot. and resting in the bores of casings H and I,the tube D, secured in passage D, and an air-conducting pipe within thepipe L, substantially as described.

2. In a blow-pipe, thecombiuatiou, with the casing B, having passages Dand G, of the casings H and I, located in either end of said casing B,the tube D, secured in passage D, the pipe L, having a slot and restingin the bores of casings H and I, the casing II having a thumb-piece h,and a spring K, surrounding the casing H, substantially as described.

3. In a blow-pipe, the combination, with the casing B, having passages Dand G, of the casings H and I, located in either end of said casing B,the tube D, secured in passage D, and the pipe L, having a slot andresting in the bores of casings II and I, the casing I'I- having thethumb-piece h, and the casing I the upwardly-extending ear f, throughwhich operates the thumb-screw J, substantially as set forth.

at. In abloW-pipe, the combination, with the casing B, having thepassages D and G, of the casings H and I, located in either end of saidcasing B, the tube D, secured in passage D, the pipe L, having a slotand resting in the bores of casings H and I, and an adjustable sleeve Mon said pipe L, substantially as described.

5. In a blow-pipe, a casing B, having the passages D and G, the casingsH and I, 10'- cated in either end of said casing B, the tube D, securedin passage D, the pipe L, having a slot Z and resting in the bores ofcasings H and I, a handle 0, and a screw-threaded portion b on casing B,entering said handle, as described.

In testimony whereof Iaffix my signature in presence of two Witnesses.

LEROY M. MATI-IElVS.

